Appointment with Death (1988 film)
In the 1988 film adaption of Appointment with Death, Nadine is portrayed by Carrie Fisher. The portrayal is fairly faithful to the original with a slight change to how she got involved with the Boynton family. In this adaptation, she was a student nurse and took on a job to look after Mrs Boynton as a way of paying her way through her nursing training. There she met Lennox and married him. Like in the original, Jefferson Cope is also an old flame but her she appears to conduct her affair with Jefferson Cope more actively and openly than in the book. It is not entirely clear whether she did it purely to egg Lennox to stand up for himself or she was actually rekindling her romance with Cope. She does tell Poirot that Qumran was some kind of point of inflexion. She had thought of leaving Lennox for Cope if Mrs Boynton had not died.
Appointment with Death (2008)
In the 2008 ITV adaption of Appointment with Death, Nadine is not featured. It appears that Leonard Boynton, the Lennox Boynton parallel is not married. In any case, he does not live with his stepmother Mrs Boynton. The role of looking after Mrs Boynton's medical needs is taken over by Carol Boynton.